From CoinFactsWiki

• Flowing Hair Half Dollar (1794-1795)
• Draped Bust Half Dollar (1796-1807)
  • Draped Bust Half Dollar, Small Eagle (1796-1797)
  • Draped Bust Half Dollar, Heraldic Eagle (1801-1807)
• Capped Bust Half Dollar (1807-1839)
  • Capped Bust Half Dollar, Lettered Edge (1807-1836)
  • Capped Bust Half Dollar, Reeded Edge, "50 CENTS" on Reverse (1836-1837)
  • Capped Bust Half Dollar, Reeded Edge, "HALF DOL." on Reverse (1838-1839)
• Liberty Seated Half Dollar (1839-1891)
  • Liberty Seated Half Dollar, No Drapery (1839 only)
  • Liberty Seated Half Dollar, No Motto (1839-1866)
  • Liberty Seated Half Dollar, Arrows & Rays (1853 only)
  • Liberty Seated Half Dollar, No Motto, Arrows at Date (1854-1855)
  • Liberty Seated Half Dollar, With Motto (1866-1891)
  • Liberty Seated Half Dollar, With Motto, Arrows at Date (1873-1874)
• Barber Half Dollar (1892-1915)
• Walking Liberty Half Dollar (1916-1947)
• Franklin Half Dollar (1948-1963)
• Kennedy Half Dollar (1964-Date)
  • Kennedy Half Dollar, Silver (1964 only)
  • Kennedy Half Dollar, Clad (1965-Date)
  • Kennedy Half Dollar, Clad, Bi-Centennial Reverse (1976 only)
  • Kennedy Half Dollar, Silver, Bi-Centennial Reverse (1976 only)